NEC PD78214 - Manual (Page 317)

288
µ
PD78214 Sub-Series
Fig. 10-27 Sending an Address from Master Device to Slave Device
Program processing Hardware operation Program processing
SCK pin
12
345
6
78
SB0 pin
A7
Hardware operation
A6
A5
A4
A3
A2
A1
A0
ACK
READY
Address
Master device processing (transmitter) Transfer line Slave device processing (receiver)
Interrupt handling (preparation for next serial transfer)
Set ACKD
Serial transmission
Generate
INTCSI
Clear BUSY
Serial reception
Output BUSY
Clear BUSY
BUSY
Set CMDT
Set RELT
Set CMDT
Write to SIO
Stop SCK
Read SIO
Set ACKT
Set CMDD
Clear CMDD Set RELD
Set CMDD
Generate
INTCSI
Output ACK
Compare addresses
Remark
This timing is valid only under the following conditions:
•
The master is only allowed to transmit an address.
•
The slave is only allowed to receive an address.
ACKE is set to 0 and BSYE is set to 1.